TexasCHLforum.com

Although you DO have to serve written notice to vacate, as part of the eviction process, what I've found is that there is no requirement for you to enter the structure:

"The notice to vacate - If a landlord alleges a tenant is not paying rent, the Landlord is required by law to give the tenant written notice to vacate the premises. This notice can be delivered to the tenant personally with a witness, by certified mail (return receipt requested) or by any other method allowed by law. Unless your lease specifically states otherwise, the law requires you to deliver the written notice, and then wait three days before filing your suit in Justice Court. This is a legal requirement which must be met and cannot be overlooked. "

For more info: http://www.rentlaw.com/eviction/texaseviction.htm" onclick="window.open(this.href);return false;

Eviction process I've been involved in was done via certified mail, return receipt requested.